Insulator for electrical conductors



(No Model.)

S. F. MQGILL.

INSULATOR FOR ELECTRICAL GONDUGTORS. No. 849,893. Patented Sept. 28, 1886.

B B B WITNESSES INVBNTOR (my/1% 29 BY flu/m ATTORNEYS.

UNITED STATES PATENT OEEICE.

SAMUEL F. MOGILL, OF KEENE, NEXV HAMPSHIRE.

INSULATOR FOR ELECTRICAL CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 39,893, dated September 28, 1886.

Application filed April 3, 1886. Serial No. 197.612.

To all whont it may concern:

Be it known that I, SAMUEL FRAZER Mo- GILL, of Keene, in the county of Cheshire and State of New Hampshire, have invented a new and Improved Insulation for Electrical Conductors, of which the following is a speci fication, reference being had to the drawings hereto annexed, in which Figure 1 is a perspective view showing the insulation extended for the reception of the electrical conductors. Fig. 2 is a transverse section. Fig. 3 shows the conductors received in the insulation and surrounded by the external covering. Fig. 4 shows the covering closed down upon the wires. Fig. 5 is an en larged detail sectional view on line a: w of Fig. 4.

Similar letters of reference indicate corresponding parts in all the figures of the drawlugs.

The object of my invention is to construct a simple easily-applied insulation for parallel electric conductors, aerial and underground telegraph, telephone, and electriclight circuits.

My invention consists in an insulation formed of sheet insulating materialsuch as rubberbent into reverse pockets and supported in form for use by spring-clasps, preferably made of woodsuch as hiekoryplaced at short intervals in the length of the insulator, and in the combination,with the insulator, of a covering of waterproofed canvas inclosing the insulator and the wires inclosed thereby, for strengthening the insulation and excluding moisture and dirt.fron1 contact with the conductors.

The sheet A, of rubber or similar material, forming the main part of the insulation of the electrical conductors B, is bent back and forth or folded upon itself in opposite directions, forming pockets 0, which open alternately in opposite sides of the insulator. The sheet A, thus folded, is stiffened, strengthened, and retained in suitable form for receiving the conductors B by strips D, of hickory-wood or analogous material,bent to form alternating loops, and secured to the sheet A at short intervalssay at a distance of six inches from each other. The strip D is covered with a flexible strip, E, of insulating material, which prevents the conductors from coming into contact (No model.)

with the wood. The strip is bent so that the opposite loops tend to spring together, as shown in Fig. 2, so that the openings of the pockets are narrower than their bottoms, in which the conductors B are received. A canvas covering, F, treated with waterproofed paint or other waterproofing material, is wrapped around the series of pockets and con ductors inclosed therein, and is fastened by inserting through holes a, formed near opposite edges thereof, a leather strap, b, which is wider at the ends than it is in the middle, and is drawn through the holes a in the covering, one leather strap, 1), being secured to each wooden strip D.

I preferably arrange six conductors in each insulating-covering, that being about the numher that can be readily handled in manufacture and in placing it in position for use.

As an additional means of holding the covering F on the series of wires and the insulator I provide looped springs G, which embrace the covering and tend to clasp the covering firmly upon the insulated conductors.

My improved insulator is applicable to or dinary naked telegraplrwires, it is readily applied by hand, and the compound conductor, when completed, is very flexible and may be readily handled.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. An insulator for electrical conductors, formed of a sheet of insulating materialsuch as rubber-bent alternatelyin opposite directions or folded upon itself to form pockets for receiving the conductors, substantially as described.

2. The combination, with a sheet of insulating materialsuch as rubberloeut alternately in opposite directions or folded upon itself to form pockets, of a non-conducting spring formed of a strip of wood or analogous material bent alternately in opposite directions, forming oppositely-disposed loops, substantially as described.

3. The combination, with a sheet of insulating material-such as rubberbent alternately in opposite directions or folded upon itself to form pockets, of a nonconducting spring formed of a strip of wood or analogous material bent alternately in opposite directions,

forming oppositely-disposedloops, and covering E, secured to the spring, substantially as described.

4. The combination, with the insulator A, formed of a sheet of insulating material bent alternately in opposite directions, forming longitudinal pockets for receiving the electrical conductors, and the electrical conductors contained by the pockets, of the canvas covering F and means, substantially as shown and described, for fastening the covering.

5. The combination, with the insulator A,

formed of asheet of insulating material bent alternately in opposite directions, forming longitudinal pockets for receiving the electrical conductors, and the electrical conductors contained by the pockets, of the canvas covering F, having holes a, and the leather strap b, provided with widened ends, secured to the insulating-covering and received in the holes a, 20 substantially as described.

6. The combination, with the insulator A, formed of a sheet of insulating material bent alternately in opposite directions,forming longitudinal pockets for receiving the electrical 25 conductors, and the'electrical conductors contained by the pockets, of the'canvas covering F and springs G, embracing the covering, substantially as described.

SAMUEL F. MGGILL.

Witnesses:

WILLIAM G. HALL, EDWARD FARRAR. 

